Spark-arrester.



Patented Aug. 3, 1909.v

@ven/50 7^.'

a q z :t: z.

WQZ-nesses.

iiNin HERMANN LIEGHTY, OF BERNE, SWITZERLAND.

SPARK-ARRESTER.

To all whom 'it may concern:

Be it known that I, HERMANN LIECHTY, a citizen of the Canton of Berne,Switzerland, residing in Berne, Switzerland, have invented a certain newand improved Spark- Arrester, of which the following is a speciication.

This invention relates to a spark arrester for locomotives or the like,in which the surfaces in the smoke-box for diverting the sparks are moreopposed to the gases coming from the furnace the greater the suction inthe smoke boX, that is the more the plates or the like that constitutethe diverting surfaces allow the gases to pass up the chimney.

The drawings illustrate one form of the invention, Figure l being a sideelevation of a locomotive smoke-box partly broken to show the deviceaccording to the invention, and Fig. 2 a plan of the device removed fromthe smoke-box.

The spark arrester comprises a chamber a, of which the bottom l) is ametal ring fixed to the upper end of the blast pipe c, and the top d isa metal ring fixed to a downward extension e of the chimney. The wall ofthe chamber near the boiler end is composed of an upright plate i, whilethe side walls consist of plates forming wings h and h which revolve onvertical pivots held between the bottom and top of the chamber. Byopening and closing these wings the draft induced through the fire bythe steam blast can be regulated. OwingA to this lateral arrangement ofthe wings, the latter are opposed to a greater 'extent to the flyingsparks the greater the cross section, which is dependent on theiradjustment for the passage of the combustion gases exhausted from thesmokebox into the chimney, that is to say the greater the vacuum in thesmoke box the greater the velocity of the sparks. ln other words, wingsh, h', when closed, form a continuous cylindrical wall intermediaterings l), l), and adjoining plates t, so that the smoke boX is entirelycut off from the chimney. lf it is desired to create a draft in the firechamber, wings h, h', are simultaneously Specification of LettersPatent.

Application filed April 2, 1907.

Patented Aug. 3, 1909.

Serial No. 366,018.

turned to a greater or less extent, to establish communication betweenthe smoke box and the chimney. As the wings are unfolded or opened toassume a position more or less transverse to the direction of the draft,the sparks, (entering from the left,

Figs. l and 2), on encountering the wings,

will be prevented from entering the chimney. Furthermore, the wings areadvantageously arranged so that the chamber formed by them has thelargest cross section for the passage of the smoke gases near thesmokebox door, thus affording the sparks the longest path possible. Thewings may be adjusted from the foot-plate by the aid of the system oflevers Z, 7c, while a shield m, secured to smoke boX door n, preventsthe sparks from directly entering the rear of chamber a.

The details of the spark arrester may, of course, be varied. Forexample, the wings may be different, both in number, shape andarrangement from those shown. The adjustment of the wings may bedifferently arranged, and the chamber instead of being round may besquare or may be only part of a chamber.

`What I claim as new and desire to secure by Letters Patent isz- In adevice of the character described, the combination with a smoke boxprovided with a stack, of an upper and lower ring located therein andspaced apart, wings journaled between said rings, an upright plateconnecting the rings at the back of the smoke box, a shield projectingforwardly from the lower ring, a blast pipe opening into said lowerring, and means of communication between the stack and the space betweenthe rings.

ln witness whereof, l have hereunto signed my name in the presence oftwo subscribing witnesses` HERMANN LIECHTY.

Vitnesses z E. LOEN, P. HAENN.

